Article
Chemistry, Multidisciplinary
Zhoutao Sun, Chen Kang, Xiaohui Fang, Hongmei Liu, Jinxin Guo, Xinping Zhang
Summary: Research demonstrates high sensitivity detection of crystal violet in aqueous solution using a capillary-based static liquid phase SERS method without the need for pre-functionalization, achieving an enhancement factor as high as 10^8 and a detection limit of 10^-9 M.
NANOSCALE ADVANCES
(2021)
Article
Materials Science, Multidisciplinary
Thi Huyen Trang Nguyen, Thi Mai Anh Nguyen, Cong Doanh Sai, Thi Hai Yen Le, Thi Ngoc Anh Tran, Thanh Cong Bach, Van Vu Le, Nguyen Hai Pham, An Bang Ngac, Viet Tuyen Nguyen, Thi Ha Tran
Summary: The research combined sputtering and post annealing methods to prepare gold nanoparticles with uniform distribution on cover glass substrates, and studied the effect of gold thickness on the formation of nanoparticles. The study also analyzed the impact of size, inter-distance, and morphology of gold NPs on plasmon properties using SEM and absorption spectroscopy. Different morphologies' enhancement capabilities were verified using FDTD technique, demonstrating the efficient performance of the prepared gold nanoparticles arrays as SERS substrates.
Article
Multidisciplinary Sciences
Hajir Hilal, Qiang Zhao, Jeongwon Kim, Sungwoo Lee, MohammadNavid Haddadnezhad, Sungjae Yoo, Soohyun Lee, Woongkyu Park, Woocheol Park, Jaewon Lee, Joong Wook Lee, Insub Jung, Sungho Park
Summary: This study demonstrates a new three-dimensional nanostructure with polarization-independent SERS activity, prepared through a precise synthesis method. This unique structure shows efficient interaction with light and analytes, providing new possibilities for optical-based sensing.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Guiqing Wen, Yang Xiao, Shuxin Chen, Xinghui Zhang, Zhiliang Jiang
Summary: A new method for detecting trace Co2+ in water was developed in this study, which is fast, stable, sensitive, and specific with dual mode characteristics. The method has been successfully applied to the detection of Co2+ in industrial wastewater, tap water, and river water.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Kirill Khabarov, Emiliia Filalova, Messan Nouraldeen, Ekaterina Kameneva, Andrey Musaev, Sergei Tikhonov, Victor Ivanov
Summary: In this study, the influence of agglomeration degree of nanoparticles on the signal enhancement of surface-enhanced Raman spectroscopy (SERS) was investigated. It was found that structures formed mainly from non-agglomerated nanoparticles can enhance the SERS signal better. Aerosol nanoparticles modified by pulsed laser radiation show better results compared to thermally modified nanoparticles.
Review
Biochemistry & Molecular Biology
Jorge Jimenez-Cisneros, Juan Pablo Galindo-Lazo, Miguel Angel Mendez-Rojas, Jessica Rosaura Campos-Delgado, Monica Cerro-Lopez
Summary: The study focuses on utilizing TiO2 NTs as a solid support for building SERS substrate nanoplatforms to achieve low-cost, reproducibility, high sensibility, and recyclability. TiO2 NTs are easily prepared, able to support metal nanoparticles of different sizes promoting high enhancement factors and reproducibility, and possess self-cleaning property for recyclability. Various methodological strategies have been discussed for achieving high performance SERS substrates based on TiO2 NTs.
Article
Multidisciplinary Sciences
Zhilun Zhao, Chen Chen, Shixuan Wei, Hanqing Xiong, Fanghao Hu, Yupeng Miao, Tianwei Jin, Wei Min
Summary: Raman-active nanoparticles (Rdots) with ultra-brightness and compact sizes are developed for high-resolution imaging of complex biological networks and immunostaining of specific protein targets.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Ruoqi Ai, Christina Boukouvala, George Lewis, Hao Wang, Han Zhang, Yunhe Lai, He Huang, Emilie Ringe, Lei Shao, Jianfang Wang
Summary: A simple method for reshaping immobilized Au nanoplates through plasma treatment is demonstrated, resulting in the formation of nearly periodic right pyramid arrays on the surface. The gaseous environment in the plasma-treatment system, specifically nitrogen-containing environments, plays a significant role in the reshaping process. The reshaped Au nanoplates exhibit enhanced optical properties, including higher refractive index sensitivities and increased surface-enhanced Raman scattering intensities.
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Optics
N. N. Yusof, S. Hashim, M. N. Azlan, S. M. Iskandar, M. H. M. Zaid, R. Hisam, S. N. Nazrin
Summary: The study explores the manipulation of surface plasmon resonance of silver and gold nanoparticles in amorphous material through heat treatments. Multiple anomalous SPR bands were observed, along with absorption and photoluminescence bands of Nd3+ ions. The findings have important implications for customizing solid-state laser materials.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Analytical
Semra Akgonullu, Adil Denizli
Summary: The detection and identification of clinical biomarkers have become a significant concern in biomedical analysis. Efforts have been made to develop single-molecule analytical platforms to address this concern. Plasmonic nanomaterials have shown fascinating advancements in energy, catalyst chemistry, optics, biotechnology, and medicine. These materials can be successfully used in pharmaceutical and biomedical analysis for biomolecule and drug detection. Plasmonic-based sensing technology, using surface plasmon resonance (SPR) or localized surface plasmon resonance (LSPR) phenomena, offers high sensitivity and selectivity. This critical paper provides an overview of SPR, LSPR, surface-enhanced Raman scattering (SERS), surface-enhanced infrared absorption (SEIRA), surface-enhanced fluorescence (SEF), and plasmonic nanoplatforms for pharmaceutical and biomedical applications.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Lexian Shi, Can Wang, Dong Su, Lisheng Zhang, Peijie Wang, Yan Fang
Summary: The addition of foreign molecules to colloidal gold or silver nanoparticles results in a new abnormal optical absorption (AOA) band, which usually appears in the long-wavelength region. This AOA band, previously debated as the characteristic longitudinal localized surface plasmon resonance (LSPR) effect, is now attributed to the charge-transfer resonance absorption from gold nanoparticles to adsorbed molecules. The excitation wavelength at 785 nm resonates with the broad AOA band, enhancing the SERS peaks of adsorbed pyridine molecules, while the excitation wavelength at 532 nm, resonating with the LSPR absorption band of individual gold nanoparticles, results in weak SERS peaks.
Article
Materials Science, Ceramics
Istvan Csarnovics, Miklos Veres, Petr Nemec, Sandor Molnar, Sandor Kokenyesi
Summary: This study investigates the plasmon field enhanced light-induced changes in the amorphous Ge24Se76 layer incorporating Au nanoparticles, which influences the optical and structural properties of the material. The presence of gold nanoobjects enhances the Raman signal of the structure and the recording of the optical grating pattern into the layer.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Ao Zhang, Jijun Feng, Jingci Yan, Mengyun Hu, Ling Zhang, Heping Zeng
Summary: This study demonstrates the laser reshaping of gold plates to generate particles with different size and shape, which are then used for highly sensitive label-free surface-enhanced Raman scattering detection. The nanosecond and femtosecond lasers can reshape the gold particles into spherical-hexagonal and spherical/triangle shapes respectively, enhancing the Raman signal and achieving a low detection limit for ciprofloxacin sensing. The ultrafast laser reshaping of gold nanoparticles has potential applications in plasmonic enhanced sensing for convenient biomaterial detection.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yu Chen, Min Liu, Han Huang, Fangping Ouyang
Summary: Multi-path remote-excited SERS can be achieved in a two-dimensional hollow gold nanosheet structure, where a hollow cavity is concentrically located in the middle of a gold nanosheet. The introduction of the hollow cavity allows for modulation of localized surface plasmon resonance and brings in a new coupling effect between different vertices. FDTD simulations show a red-shift of LSPR peak with the increase of cavity size. The remote signal of LSPR scattering can be significantly enhanced, by over 228%, 597%, and 1155% for dual-, triple-, and quad-path-excitation, respectively, under the optimum coupling polarization.
RESULTS IN PHYSICS
(2022)
Article
Immunology
Anita G. Amin, Prithwiraj De, John S. Spencer, Patrick J. Brennan, Joshua Daum, Barbara G. Andre, Maju Joe, Yu Bai, Lars Laurentius, Marc D. Porter, William J. Honnen, Alok Choudhary, Todd L. Lowary, Abraham Pinter, Delphi Chatterjee
Article
Chemistry, Multidisciplinary
Lars Laurentius, Stanislav R. Stoyanov, Sergey Gusarov, Andriy Kovalenko, Rongbing Du, Gregory P. Lopinski, Mark T. McDermott
Article
Chemistry, Physical
Kambiz Chizari, Alexander Vena, Lars Laureritius, Uttandaraman Sundararaj
Article
Chemistry, Multidisciplinary
Navid Farhoudi, Hsuan-Yu Leu, Lars B. Laurentius, Jules J. Magda, Florian Solzbacher, Christopher F. Reiche
Article
Chemistry, Multidisciplinary
Navid Farhoudi, Lars B. Laurentius, Jules J. Magda, Christopher F. Reiche, Florian Solzbacher
Summary: A novel glucose sensor using smart hydrogels as sensing elements eliminates the need for implanted electronics by utilizing an external ultrasound transducer for readout. The sensor works by detecting glucose concentration changes in interstitial fluid through resonance absorption of ultrasound waves in glucose-sensitive hydrogels. The ability to tune resonance frequencies of the hydrogels allows for multiple sensors to be colocated and read out using the same ultrasound transducer, opening up possibilities for future use of biodegradable hydrogels.
Article
Chemistry, Analytical
Eamonn Clarke, Ryan Robinson, Lars B. Laurentius, Marc D. Porter
Summary: This paper investigates the use of proteinase K (ProK) as an enzymatic pretreatment protocol for analyzing human serum samples containing mannose-capped lipoarabinomannan (ManLAM) – a biomarker for tuberculosis (TB) infection. The study examines how different ProK reaction conditions affect the recovery and detectability of ManLAM in human serum, and shows that optimizing the digestion conditions can significantly improve the detectability of ManLAM. The findings suggest the potential use of this protocol in point-of-care TB testing.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Christopher J. Lambert, Harikrishnan Jayamohan, Bruce K. Gale, Lars B. Laurentius, Dhruv Patel, Madison Hansen, Tawsif Mahmood, Himanshu Jayant Sant
Summary: This study presents an electrochemical immunoassay-based method for the precise, simple, quick, and cost-effective detection of SARS-CoV-2 nucleocapsid protein. By immunomagnetic capture of the protein in nasal samples, followed by electrochemical detection using gold nanoparticle labels on a screen-printed carbon electrode, the researchers determined optimal conditions to maximize the electrochemical signal and successfully detected the nucleocapsid protein in SARS-CoV-2-positive samples with a low viral load.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Lars B. Laurentius, Alexis C. Crawford, Timothy S. Mulvihill, Jennifer H. Granger, Ryan Robinson, John S. Spencer, Delphi Chatterjee, Kimberly E. Hanson, Marc D. Porter
Article
Chemistry, Analytical
Alexis C. Crawford, Lars B. Laurentius, Timothy S. Mulvihill, Jennifer H. Granger, John S. Spencer, Delphi Chatterjee, Kimberly E. Hanson, Marc D. Porter